94Truck

I have a 94 c1500, and am looking for any sites where I can find electrical diagrams for inside the truck, such as fuse box connections, convenience center, wires running through the firewall, and steering column connections. The previous owner made a mess with connections causing shorts everywhere and I am hoping to return them back to what they were. I have a couple of diagrams that I bought at the auto parts store but I am looking for something a bit more specific.